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- 1. Fill in the Blank
Cystic fibrosis is an inherited disease that occurs when an individual is homozygous for a recessive allele.
If parents are both heterozygous for this characteristic, what is the probability that their first child will have cystic fibrosis?
- 2. Multiple Choice
What determines the sex of a baby?
the father’s blood group
the father’s chromosomes
the mother’s blood group
the mother’s chromosomes
- 3. Multiple Choice
An individual has the genotype Bb.
What is the correct description of this genotype?
heterozygous, with two different alleles of the same gene
heterozygous, with two different genes of the same allele
homozygous, with two different alleles of the same gene
homozygous, with two different genes of the same allele
- 4. Multiple Choice
The diagram shows the inheritance of flower colour in pea plants.
At which stages in the diagram does meiosis occur?
W and Y
W and Z
X and Y
X and Z
- 5. Fill in the Blank
In an animal, the allele for straight fur is dominant to the allele for curly fur.
A pair of these animals mate and have nine offspring with straight fur and three with curly fur.
F represents the allele for straight fur and f represents the allele for curly fur.
What are the most likely genotypes of the parents?
- 6. Fill in the Blank
A pure-breeding white mouse was crossed with a pure-breeding black mouse. All their offspring
were black.
Then, one of the offspring was bred with a pure-breeding white mouse. They produced 10 baby mice.
What are the most likely colours of these mice?
- 7. Fill in the Blank
In pea plants, the allele for tall stems is dominant to the allele for short stems.
A heterozygous tall plant is crossed with a short plant, and 100 offspring are produced.
How many of the offspring are likely to be tall?
- 8. Fill in the Blank
In a species of plant, the allele for red flowers (R) is dominant over the allele for white flowers (r).
Two red–flowered plants were crossed as shown in the diagram.
What are the genotypes of the parents?
- 9. Fill in the Blank
short-toed animal was crossed with a long-toed animal of the same species. All the offspring had short toes. One of these offspring was crossed with another long-toed animal of the same species.
Which ratio of short-toed to long-toed animals should be expected?
- 10. Multiple ChoiceLong tongues (T) are dominant to short tongues in green tree frogs. What is the probability that two frogs that are heterozygous for long tongues could produce offspring with short tongues?100%75%50%25%
- 11. Multiple Choice
What is the genotypic ratio from this punnet square?
1:0
3:1
1:1
1:2:1
- 12. Multiple Choice
The genotypic ratio for this cross is:
3:1
1:2:1
9:3:3:1
1:0
1:1
- 13. Multiple Choice
The phenotypic ratio for this cross is:
3:1
1:2:1
9:3:3:1
1:0
1:1
- 14. Multiple ChoiceWhat is the yellow seed genotype?aaAaAAAA or Aa
- 15. Multiple ChoiceIn plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a short plant?0%25%50%75%
- 16. Multiple ChoiceWhich of the following alleles is homozygous (purebred) recessive?TtttTTt
- 17. Multiple ChoiceIn screech owls, red feathers are dominant over gray feathers. If two heterozygous red-feathered owls are mated, what percentage of their offspring would be expected to have red feathers?25%50%75%100%
- 18. Multiple ChoiceBrown (B) is dominant over white (b). Which genotype is a purebred for brown fur?BBBbbbAll of the above
- 19. Multiple ChoiceWhat gamete possibilities could come from this parent's genotype?AB, AB, aB, aBAb, AB, Ab, abAb, Ab, Ab, AbAB, aB, ab, aB
- 20. Multiple Choice
What goes in box 3
Aabb
AABB
AAbb
aaBb
- 21. Multiple ChoiceWhat genotype is missing from this Punnett Square?RrYyRRYYrryyRrYY
- 22. Multiple ChoiceBased off this punnett square, what fraction of the offspring will have wrinkled, yellow seeds?9/163/161/1616/16
- 23. Multiple Choice
This image is an example of a _____________ cross.
Monohybrid
Dihybrid
Purebred
Pure Breeding
- 24. Multiple ChoiceWhat proportion of the offspring in Figure 11-4 would be expected to have white, smooth hair?9/163/164/161/16
- 25. Multiple Choice
What percent of the parakeets from this cross look like the first parent in P1?
7
8
9
11
- Answer choicesTagsAnswer choicesTags